At the beginning of combat on your turn, target creature you control gains indestructible until end of turn.
{1}{R}: Nahiri's Machinations deals 1 damage to target blocking creature.
Destroying a blocking creature doesn’t cause the creature it was blocking to become unblocked.
Players can respond to the triggered ability of Nahiri’s Machinations by destroying the creature you target before the ability that gives it indestructible has resolved.